the right answer is there just want to know why its right and why it was wrong to. Thank you so much

Brady Corporation is preparing an income statement for year ended 12/31/20. During the final week of 2020, Brady earned revenues of $6,000 on account. It expects to collect the $6,000 on 1/10/21. Brady also incurred $1,500 of payroll costs which will be paid to employees on 1/15/21. Brady also paid cash of $500 for office cleaning services. No other transactions occurred in 2020. What is the net income of Brady Corporation if it uses cash basis accounting? Selected Answer: Answers: b. $4,000 a. ($500) b. $4,000 c ($4,000) d. $500 O'Dea, Inc. has the following inventory data: July 1 Beginning Inventory 20 units at $19 $380 July 7 Purchases 70 units at $20 $1,400 July 22 Purchases 10 units at $22 $220 100 $2.000 A physical count of merchandise inventory on July 31 revealed that there are 32 units on hand. Using the average cost inventory method, what is Cost of Goods Sold amount for July? Selected Answer: Answers a $1,380 a $1,380 b. $1,360 c. $2,000 d. $1,340 The accountant of Southwest Inc. failed to make an adjusting entry to record $6,000 of unearned service revenue that has now been earned. Assume the unearned revenue was initially recorded as a liability. Which of the following statements is true? Selected Answer Answers: a. The total revenues will be overstated. a. The total revenues will be overstated. b. The total expenses will be understated. c. The total revenues will be understated d. The total expenses will be overstated